What is the cause of cracking of duplex steel stainless steel pipe? There are experts in this area to crack the seamless steel pipe inspection, and the seamless steel pipe water quality analysis. Conclusion: The fracture is intergranular corrosion fracture. Under the condition of 60 ~ 120℃, the water chloride ion and the total hardness of seamless steel pipe are more than the standard, which is an important reason for the intergranular corrosion rupture of duplex stainless steel pipe in the ground stress. Metal cracking should be caused by environmental erosion. There must be two existence criteria to produce a split. The presence of ground stresses and corrosive substances. Intergranular corrosion is one of the key ineffective ways of stainless steel plate, and typical intergranular corrosion cracks show a network structure. Research on intergranular corrosion behavior of stainless steel under different corrosive substances is one of the core contents of stainless steel corrosion exploration. This paper shows a process of stress corrosion cracking of stainless steel plate and its harm to the system, expounds the reasons of its formation, and finds effective ways to prevent the occurrence of stress corrosion cracking. Stainless steel water supply pipe interface The key interface...
The ability of metallic materials to resist indentation of hard objects is called hardness. According to different test methods and application range, the hardness standards of sanitary stainless steel precision pipes can be divided into Brinell hardness, Rockwell hardness, Vickers hardness, Shaw hardness and microhardness. 1. What are the characteristics of high hardness pipe of sanitary stainless steel precision pipe? Quenching, tempering and annealing can be used for high hardness pipes. When hardness increases, tensile strength and yield strength increase, while elongation, section shrinkage and impact energy decrease. In addition, the corrosion resistance of high hardness pipe mainly depends on the chromium content. The carbon in steel indirectly affects the corrosion resistance of steel by forming stable chromium carbide with chromium. Therefore, the lower the carbon content, the higher the corrosion resistance, and the order of corrosion resistance and strength is reversed. Therefore, when processing high hardness products, in order to improve the strength and hardness of sanitary grade stainless steel precision tube, the carbon content will increase, leading to the reduction of product plasticity and corrosion resistance. Therefore, the corrosion resistance of products processed by sanitary grade stainless steel precision tubes is poor. 2. What is high hardness stainless...
The ability of a metal material to resist indentation by a hard object is called hardness. According to different test methods and application ranges, the hardness standards of sanitary stainless steel precision tubes can be divided into Brinell hardness, Rockwell hardness, Vickers hardness, Shore hardness and microhardness. 1. What are the characteristics of high hardness pipes of sanitary stainless steel precision pipes? Quenching, tempering and annealing can be used for high hardness pipes. As hardness increases, tensile strength and yield strength increase, while elongation, cross-sectional shrinkage, and impact energy decrease. In addition, the corrosion resistance of high-hardness pipes mainly depends on the chromium content, and the carbon in the steel indirectly affects the corrosion resistance of the steel due to the formation of stable chromium carbide with chromium. Therefore, the lower the carbon content, the higher the corrosion resistance, and the order of corrosion resistance and strength is reversed. Therefore, when processing high-hardness products, in order to improve the strength and hardness of sanitary stainless steel precision tubes, the carbon content will increase, resulting in reduced product plasticity and corrosion resistance. Therefore, the corrosion resistance of products processed from sanitary stainless steel precision tubes is poor. 2. What is high...
The maintenance of sanitary stainless steel precision pipe is one of the most important factors to prolong the service life of stainless steel pipe. So how should you maintain it when using it? Sanitary grade stainless steel precision tube Its hardness HBW≤187HRB≤90HV≤220 Tensile strength ≥480MPa Elongation ≥40% Yield strength ≥175MPa Density 7.98/cm3 Sanitary grade actual melting point is 1375-1450 ℃, solid solution 1010-1150 during use ℃ rapid cooling. Due to the addition of Mo, the sanitary stainless steel precision pipe has excellent corrosion resistance; the daily maintenance precautions of the sanitary stainless steel pipe, the high temperature strength is also very good; what everyone needs to know here is the excellent work hardening (weak magnetism after processing); The solid solution state is non-magnetic. Sanitary seamless pipe has good resistance to chloride corrosion. In various media such as seawater, its corrosion resistance is better than 0Cr18Ni9. Now its application range is mainly used as a pitting corrosion-resistant material for products with special requirements for intergranular corrosion; due to its large carbon content, it reaches 0.03. It can be used for welding requirements Applications for post annealing and high corrosion resistance. Sanitary stainless steel precision pipes are mainly used in seawater equipment,...
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